CA1075737A - Fluid pressure control valve device arranged for fail-safe operation - Google Patents
Fluid pressure control valve device arranged for fail-safe operationInfo
- Publication number
- CA1075737A CA1075737A CA309,143A CA309143A CA1075737A CA 1075737 A CA1075737 A CA 1075737A CA 309143 A CA309143 A CA 309143A CA 1075737 A CA1075737 A CA 1075737A
- Authority
- CA
- Canada
- Prior art keywords
- control
- pressure
- bellows
- piston
- fluid pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000012530 fluid Substances 0.000 title claims abstract 12
- 230000009467 reduction Effects 0.000 claims abstract description 13
- 230000006835 compression Effects 0.000 claims abstract description 8
- 238000007906 compression Methods 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims 2
- 208000036366 Sensation of pressure Diseases 0.000 abstract description 3
- 238000006722 reduction reaction Methods 0.000 description 11
- CEJLBZWIKQJOAT-UHFFFAOYSA-N dichloroisocyanuric acid Chemical compound ClN1C(=O)NC(=O)N(Cl)C1=O CEJLBZWIKQJOAT-UHFFFAOYSA-N 0.000 description 2
- 230000003137 locomotive effect Effects 0.000 description 2
- 235000002020 sage Nutrition 0.000 description 2
- 244000273618 Sphenoclea zeylanica Species 0.000 description 1
- 240000004543 Vicia ervilia Species 0.000 description 1
- PBAYDYUZOSNJGU-UHFFFAOYSA-N chelidonic acid Natural products OC(=O)C1=CC(=O)C=C(C(O)=O)O1 PBAYDYUZOSNJGU-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/18—Triple or other relay valves which allow step-wise application or release and which are actuated by brake-pipe pressure variation to connect brake cylinders or equivalent to compressed air or vacuum source or atmosphere
- B60T15/24—Triple or other relay valves which allow step-wise application or release and which are actuated by brake-pipe pressure variation to connect brake cylinders or equivalent to compressed air or vacuum source or atmosphere controlled by three fluid pressures
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Braking Systems And Boosters (AREA)
- Regulating Braking Force (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/849,821 US4125294A (en) | 1977-11-09 | 1977-11-09 | Fluid pressure control valve device arranged for fail-safe operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1075737A true CA1075737A (en) | 1980-04-15 |
Family
ID=25306601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA309,143A Expired CA1075737A (en) | 1977-11-09 | 1978-08-11 | Fluid pressure control valve device arranged for fail-safe operation |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4125294A (enExample) |
| JP (1) | JPS5475711A (enExample) |
| CA (1) | CA1075737A (enExample) |
| ZA (1) | ZA782263B (enExample) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5192118A (en) * | 1991-06-06 | 1993-03-09 | Westinghouse Air Brake Company | Electro-pneumatic locomotive brake control system |
| US5358315A (en) * | 1993-04-01 | 1994-10-25 | Westinghouse Air Brake Company | Microprocessor-based electropneumatic locomotive brake control system having pneumatic backup brake control |
| US9333959B2 (en) | 2012-04-03 | 2016-05-10 | Wabtec Holding Corp. | Brake cylinder maintaining valve |
| US10112594B2 (en) * | 2015-09-23 | 2018-10-30 | Amsted Rail Company, Inc. | Brake cylinder pressure maintenance valves for freight car brake equipment |
| AU2017229218B2 (en) * | 2016-03-07 | 2021-10-28 | Westinghouse Air Brake Technologies Corporation | Brake cylinder maintaining valve |
| US9925969B2 (en) | 2016-03-07 | 2018-03-27 | Westinghouse Air Brake Technologies Corporation | Cut-off valve and hot wheel protection valve arrangement |
| US10059320B2 (en) * | 2017-01-25 | 2018-08-28 | Westinghouse Air Brake Technologies Corporation | Automatic retainer valve |
| US10647309B2 (en) | 2017-12-08 | 2020-05-12 | Westinghouse Air Brake Technologies Corporation | Quick Service Limiting Valve |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4025126A (en) * | 1976-01-19 | 1977-05-24 | Westinghouse Air Brake Company | Brake control valve device with movable control reservoir charging valve |
| US4043605A (en) * | 1977-01-10 | 1977-08-23 | Westinghouse Air Brake Company | Emergency portion for a brake control valve |
-
1977
- 1977-11-09 US US05/849,821 patent/US4125294A/en not_active Expired - Lifetime
-
1978
- 1978-04-20 ZA ZA00782263A patent/ZA782263B/xx unknown
- 1978-08-11 CA CA309,143A patent/CA1075737A/en not_active Expired
- 1978-11-06 JP JP13593978A patent/JPS5475711A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5475711A (en) | 1979-06-16 |
| US4125294A (en) | 1978-11-14 |
| ZA782263B (en) | 1979-04-25 |
| JPS5636100B2 (enExample) | 1981-08-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |